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In a database, metadata describes the structure, relationships, and attributes of primary data. For instance, in a table containing employee records, primary data includes individual employee details, while metadata includes the table name, column names, data types, and constraints. Metadata improves database usability by ensuring data integrity, enabling efficient queries, and supporting schema evolution. This contextual layer is critical for data-driven organizations to manage and scale their systems effectively. Why Other Options Are Incorrect: • A: Metadata can exist in relational databases (e.g., schema tables), not just flat files. • C: Metadata does not contain raw values but provides descriptive context for primary data. • D: Metadata often describes structured data but is not inherently more or less structured. • E: Metadata and primary data have distinct roles; they cannot be used interchangeably.
A jar contains a mixture of mango juice and water in the ratio of 5:2. 84 litres of the mixture was taken out and 34 litres of water was added to it. If...
A boat takes 12 hours to cover 's' km in still water. While traveling downstream, it takes 8 hours to cover (s - 32) km. If the speed of the boat in sti...
In a mixture of milk & water, 45 litres water is mixed due to which ratio changes from 3 : 4 to 1 : 3. Find initial quantity of mixture. (in litres)
161 litres mixture of milk and water is mixed in an empty container in the ratio 5:2, respectively. If 14 litres of mixture is replaced with 14 litres o...
A tank initially contains a water-alcohol mixture in a 7:3 ratio. After removing 20 liters of the mixture and replacing it with pure alcohol, the ratio ...
A 270 litres mixture of mango juice and lemon juice contains mango juice and lemon juice in the ratio of 7:2. How much lemon juice should be added to th...
A chemist prepared 50 grams of a medicine by mixing two ingredients P and 'Q, Rate of 'P' is ₹150 per 10 gm and that of 'Q' is ₹ 500 per 100 gm. 'P'...
In a Glass there is 520 ml of a mixture composed of juice and water in a ratio of 17:9. If 'y' ml of juice and 'y + 60' ml of water are added to this mi...